PD780701Y_15 Datasheet, PDF (36/66 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD780701Y, 780702Y
Figure 4-17. IEBus Controller Block Diagram (µPD780702Y only)
Internal
registers
IRX0
ITX0
CPU interface
8
12 12 12
8
8
8
8
8
8
8
8
BCR0 (8)
8
UAR (12)
12
SAR (12)
12
PAR (12)
12
CDR (8)
8
DLR (8)
8
DR (8)
8
USR (8)
8
ISR (8)
8
SSR (8) SCR (8) CCR (8)
8
8
8
NF
MPX
MPX
Internal bus
8
PSR (8 bits)
12
8
12-bit latch
TX/RX
Comparator
Parity
generation/
error detection
Contention
detection
Interrupt
control
circuit
Interrupt control
INT request
IEBus interface
ACK
generation
CLK
5 Internal bus R/W
Bit processing
Field processing
34
Preliminary Product Information U13920EJ1V0PM00